Which of the following Layer $2$ sessions, depending on the encapsulation and session initiator, does BNG

support? $($Choose three.$)$XXXXXXXXXXX

$1.$PTA session for IPv$4,$ IPv$6,$ and dual stack.!!!!!!!!!!!!!!!!!

$2.$IPoE IPv$4$ packet$-$triggered.!!!!!!!!!!!!!!

$3.$IPoE IPv$6$ DHCP$-$triggered.

$4.$IPoE IPv$6$ packet$-$triggered.!!!!!!!!!!!!!!!!